The EVP cipher routines are a high level interface to certain symmetric ciphers.
The EVP cipher routines are a high level interface to certain symmetric ciphers.
Questions tagged [evp-cipher]
69 questions
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1 answer
Working with EVP and OpenSSL, coding in C
I've seen many questions on OpenSSL and EVP, but not very many clear answers, but I figured I'd still post my question here and hope for better feedback.
The materials given to me are a signed file "symmetrickey.bin", an RSA key set…
Chris Wendling
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1 answer
Segmentation fault in EVP_CIPHER_CTX_new() when using OpenSSL in C
I am a total beginner with the OpenSSL Library in C but was working on a code to encrypt using the libraries while taking a pass phrase as input and generating the salt,IV and key from the pass phrase. This is what I have tried till now:
int…
Ashwin_Mathew
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Does Digest Init-Update-Final mechanism make a copy of input data?
I compute a hash using init-update-final mechanism i.e. initialize the hash context, followed by hash update with various sizes of input data, and a final digest calculation. This can be done using the EVP_DigestInit, EVP_DigestUpdate and…
SkypeMeSM
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1 answer
Undefined reference to EVP_idea_ecb on Debian
I have the following code:
#include
#include
#include
int main (int argc, char *argv[]) {
EVP_CIPHER *cipher;
EVP_idea_ecb();
}
I know, this is not much, but it should compile without complaints, but I…
user3417078
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1 answer
Encryption using AES_* functions and EVP_* functions
I have some data that was encrypted using the openssl (AES_*) functions. I want update this code to use the newer (EVP_*) functions. But should be able to decrypt data that was encrypted using the old code.
I've pasted below both the old and the…
Code Robot
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1 answer
OpenSSL EVP_CIPHER free/release
I can't find any method like EVP_CIPHER_free in openssl/evp.h. Don't I need to release the EVP_CIPHERs?
miho
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Disabling padding in OpenSSL version 3
im trying to write a program that disable padding when it encrypts a message in C language.
I figured out, by reading the documentation, that the correct function to use is EVP_CIPHER_CTX_set_padding(). I used it but the program still doesn't work.…
FilResto
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Decryption failure using openssl EVP_CipherFinal_ex
I am trying to encrypt and decrypt a buffer using openssl.
I took some example code from here (see the 2nd do_crypt function towards the end of the page) and modified it to take the message to encrypt/decrypt from a vector instead of an input…
Simpsons
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awscrt python module throwing 'undefined symbol: EVP_aead_aes_128_gcm_tls13' error in ARM yocto
I have a custom ARM gateway on which I am trying to run a greengrass v2 component. This requires python awsiotsdk. But when I import the awsiotsdk I am getting this error:
ImportError:…
Kiran G
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3 answers
OpenSSL EVP AES Encryption and Base64 Encoding producing unusable results
So I'm trying to reproduce an encryption and encoding operation in C, that I've managed to make work in C#, JScript, Python and Java. Now, it's mostly just for obfuscating data - not actual encryption - so it's basically for aesthetic purposes…
krzychostal
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EVP_DecryptUpdate() returns 0
For some reason, I am getting 0 from EVP_DecryptUpdate() function when I am passing 32 as its last parameter but when I changed it to 64 it returns 1. The buffer size is 32.
According to the documentation, I should get a 1 if the decrypt is…
Kivuos
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OpenSSL encryption/decryption command line in C++
can you tell me what the C++ equivalent is for the command line OpenSSL commands for encrypting a file:
openssl enc -nosalt -aes-256-cbc -kfile c:\temp\key -in c:\temp\binary.png -out c:\temp\binary.enc
and decrypting that file back again :
openssl…
xyfix
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Is there any way to set members of opaque structs in openssl v1.1.0 or greater?
I am restructuring a legacy code to be compatiable with OpenSSL 1.1.1, During the upgrade of OpenSSL from 1.0.2 -> 1.1.1, serveral structs were made opaque and direct member access is no longer possible.
I have a requirement to set buf_len of…
Kethiri Sundar
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C Encryption logic not matching with java
I am looking for equivalent C code for below java code.
i am trying to write two application one in java and other in C.
Java application encrypt/decrypt "string" with below logic, and it is working when using below java method.
public class…
Aby
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HMAC verification goes wrong with Openssl EVP
The code i wrote somehow does not work properly.
When using the same key and cipher with an online tool, the hmac is different.
My code is:
EVP_MD_CTX* mdctx = NULL;
const EVP_MD* md = NULL;
EVP_PKEY *pkey = NULL;
unsigned char…
root
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